Immersion heater



FIG. 1 is a perspective view of an immersion heater showing our newdesign;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a back elevational view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The dashed broken lines appearing in the figures are for the purpose ofillustrating portions of the immersion heater that form no part of theclaimed design.

The dot dash line appearing in FIG. 7 is for the purpose of illustratingthe bounds of the claim and forms no part thereof.

CLAIM The ornamental design for an immersion heater, as shown anddescribed.